Which best describes a reference frame? a distance over which an object moves the difference between start and end velocity a position from which something is observed the average speed of a group of objects

i think the answer is b

b would be the answer

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

the answer is b, have negligible mass